OMG. What an amazing mystery! I loved every bit of it despite not being able to completely piece everything together without the help of the comments. Sadly, I do have one FINAL please for help. Please skip down below to the question ONLY if you have completed the game.
*SPOILERS START HERE*
I have 95 files and I am desperate to find the last one. I assume it has to be a file in 00 because Annie at one points mentions there were 4 bodies on the first day. Unfortunately, I am totally clueless as to who the person is and where they could be located. I do have the scene with Kathering at WI, John in the EN so I should have most of it. As a small aside, am I meant to learn anything more about the @ person? I know very little other than the descriptions they give in the story about the characters or the name in the "From" section of our email. Thank you in advance for your help.
PS. Files 21-LI-1-2-4 and 23-CH-1-2 have a (1) next to them. The former is why I assumed there was a fourth body.